[BREAKING] Change default ER diagram format to 'svg'

[k1LoW]

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[codecov]

Codecov Report

Merging #244 into master will decrease coverage by 0.86%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #244      +/-   ##
==========================================
- Coverage   68.00%   67.13%   -0.87%     
==========================================
  Files          21       21              
  Lines        3679     3679              
==========================================
- Hits         2502     2470      -32     
- Misses        933      970      +37     
+ Partials      244      239       -5     

Impacted Files	Coverage Δ
config/config.go	50.30% <ø> (ø)
datasource/datasource.go	23.13% <0.00%> (-12.55%)	⬇️

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